Ignition Coil Triggering Control

Triggering of the output (primary on/off) is based on inputs of engine speed and the position of the crankshaft. The reference position signal (one pulse per rotation) establishes the TDC position of the crankshaft by the ECM.

The engine speed signal is then used to determine the exact position of each cylinder for timing control. The ignition timing can then be updated between individual spark plug firings, as needed.

- The M73 V12 engine uses one ignition coil per bank and a conventional distributor driven by the camshaft drives. The Engine Control Module triggers the coil for each cylinder based on the parameters listed above. The ECM can modify the ignition timing on a cylinder selective basis for the knock control function.







- The balance of the systems utilize individual ignition coils per cylinder (RSV).

These systems are 100% solid state ignition systems with no moving parts. The ECM triggers each coil individually and can also modify the ignition timing on a cylinder selective basis for the knock control function.